Installation guide

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Cisco uBR7100 Series Universal Broadband Router Software Configuration Guide
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Chapter 3 Configuring the Cisco Cable Interface
Configuring Cable Modulation Profiles
Caution DOCSIS 1.0-certified cable interfaces that are given a short max-burst size might be unable to transmit
large packets to the headend.
Setting QoS Permission
The Cisco uBR7100 series CMTS supports the creation of QoS table entries by SNMP or by CM
registration requests. You can also configure a Cisco uBR7100 series CMTS to dynamically update QoS
table entries via SNMP.
To set QoS table access, use one or more of the following commands in global configuration mode.
Verifying QoS Permission
To verify QoS permissions, enter the show cable qos permission command:
CMTS01# show cable qos permission
Create by SNMP Update by SNMP Create by modems
no no yes
Tip If you are having difficulty with verification, make sure you typed the correct QoS profile number and
profile elements in global configuration mode.
Note QoS profiles can be changed dynamically, permitting service tiers that are time-sensitive. This provides
more bandwidth during business hours than on weekends for telecommuter applications.
Enforcing a QoS Profile Assignment
To override the provisioned QoS profile of a CM and enforce a CMTS-specified QoS profile, use the
following command in global configuration mode.
Command Purpose
CMTS01(config)# cable qos permission create-snmp Enable SNMP access to create entries in the
QoS tables.
CMTS01(config)# cable qos permission update-snmp Enable SNMP access to dynamically update
entries in the QoS tables.
CMTS01(config)# cable qos permission modems Enable QoS table entries to be created using
a CM registration requests.
CMTS01(config)# no cable qos permission Disable both SNMP access and CM
registration access to the QoS tables.
Command Purpose
CMTS01(config)# cable qos permission enforce
index
Assigns the QoS profile, specified by the
index number, to all CMs attempting to
connect to theCisco uBR7100 series
CMTS.